Rhenium and osmium isotopic ratios and concentrations were determined by combining isotope dilution with negative thermal ionisation (N-TIMS) techniques using a ThermoScientific Triton at Durham University (UK). The analyses followed sample preparation utilising Carius-tube digestion of the samples with Cr(VI)O3-H2SO4, purification of osmium by established solvent extraction and microdistillation methods, and rhenium purification by single-bead anion chromatography following treatment by sodium hydroxide and acetone (Selby and Creaser, 2003; Cumming et al., 2013).DROsS (50 pg) standard values (n=23): 187Os/188Os averaged 0.16075±0.00016 (1σ), consistent with the running average value of 0.16095±0.00053 (1σ) for the lab (n=424).Re standard (125 pg) values (n=19): 187Re/185Re averaged 0.59820±0.00082 (1σ), consistent with the running average value of 0.59861±0.00156 (1σ) for the lab (n=512). Four blanks were measured through the analyses carried out in this study, giving 187Os/188Os ratios averaging 0.16±0.05 (1σ), Re contents averaging 19.4±2.0 pg (1σ), and Os contents averaging 0.07±0.01 pg (1σ).The initial 187Os/188Os (Os(i)) values for the sediments as they were deposited at 94 Ma were calculated using the following equation: 187Os/188Osinitial = 187Os/188Osmeasured - (187Re/188Osmeasured (EXP(λt)-1)) where λ is the decay constant of 187Re (1.666e−11 yr−1; Smoliar et al., 1996), and t is 94.000000 yr Smoliar, M.I., Walker, R.J. and Morgan, J.W., 1996, Re-Os ages of group IIA, IIIA, IVA, and IVB iron meteorites. Science, 271, p. 1099-1102.